Custom wooden rear seat and trunk inserts that have 5” high density foam over them . These fit directly into a 2011-2015 volt . I camped on these about 4 times - honestly pretty bad ass being able to camp in a volt. Got to the campsite on 40 mpg and slept like a king

I am 6,3” 210 pounds …I fit fine curled up a bit . You need to lay at an angle to stretch out , but not bad ! I’ve even had my gf and I for a night when it was raining

$100 local in Los Angeles